Engineering Questions with Answers - Multiple Choice Questions

MCQs on Gene Expression Control – Eukaryotes

1 - Question

The sheep Dolly was cloned in the year ___________
a) 1997
b) 1999
c) 2000
d) 2002

View Answer

Answer: a
Explanation: A team of Scottish researchers reported the cloning of a mammal in 1997, a lamb which they names as Dolly. This was the first cloned mammal ever reported.




2 - Question

Single cells from an adult animal can give rise to whole new individuals.
a) True
b) False

View Answer

Answer: b
Explanation: Single cells from an adult animal cannot give rise to whole new individuals however, nuclei from such cells possess all the information necessary for developing a new organism.




3 - Question

How many types of cells were fused in the cloning of Dolly?
a) 2
b) 5
c) 7
d) 8

View Answer

Answer: a
Explanation: Two types of cells from different sheep were taken and fused with the aid of an electrical impulse in the cloning of Dolly. Enucleated unfertilized eggs from one sheep and cultured epithelial cells from udder of an adult sheep were fused together.




4 - Question

. The transcriptional state of a cell is irreversible.
a) True
b) False

View Answer

Answer: b
Explanation: The transcriptional state of a cell depends on its chromatin, and is not irreversible. It rather depends on the environment which induces the types of genes that need to expressed.




5 - Question

The processing-level control is concerned with ____________
a) primary transcripts
b) secondary transcripts
c) tertiary transcripts
d) quaternary transcripts

View Answer

Answer: a
Explanation: The processing-level control is associated with primary transcripts and involves the processing of primary messenger RNAs in the nucleus before they begin with the translation in the cytoplasm.




6 - Question

What percent of a typical Red blood cell is constituted by hemoglobin?
a) 30
b) 50
c) 75
d) 95

View Answer

Answer: d
Explanation: Red Blood cell’s primary function is to carry oxygen. 95% of the RBC’s dry weight is made up of haemoglobin. Rest of the weight included the DNA, organelles and lipid membranes.




7 - Question

Which type of control determines for how long will a particular mRNA be translated?
a) Replication-level
b) Translational-level
c) Transcriptional-level
d) Processing-level

View Answer

Answer: b
Explanation: Translational-level control determines for how long a period, and how often a particular messenger RNA molecule is translated. The translational-level control is prevalent in the cytoplasm.

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